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<pre><span class="sourceLineNo">001</span><a name="line.1"></a>
<span class="sourceLineNo">002</span>/*<a name="line.2"></a>
<span class="sourceLineNo">003</span> * Copyright (C) 2014 Archie L. Cobbs. All rights reserved.<a name="line.3"></a>
<span class="sourceLineNo">004</span> *<a name="line.4"></a>
<span class="sourceLineNo">005</span> * $Id: MapField.html 842 2015-03-07 18:20:42Z archie.cobbs $<a name="line.5"></a>
<span class="sourceLineNo">006</span> */<a name="line.6"></a>
<span class="sourceLineNo">007</span><a name="line.7"></a>
<span class="sourceLineNo">008</span>package org.jsimpledb.core;<a name="line.8"></a>
<span class="sourceLineNo">009</span><a name="line.9"></a>
<span class="sourceLineNo">010</span>import com.google.common.collect.Maps;<a name="line.10"></a>
<span class="sourceLineNo">011</span>import com.google.common.reflect.TypeParameter;<a name="line.11"></a>
<span class="sourceLineNo">012</span>import com.google.common.reflect.TypeToken;<a name="line.12"></a>
<span class="sourceLineNo">013</span><a name="line.13"></a>
<span class="sourceLineNo">014</span>import java.util.ArrayList;<a name="line.14"></a>
<span class="sourceLineNo">015</span>import java.util.Iterator;<a name="line.15"></a>
<span class="sourceLineNo">016</span>import java.util.List;<a name="line.16"></a>
<span class="sourceLineNo">017</span>import java.util.Map;<a name="line.17"></a>
<span class="sourceLineNo">018</span>import java.util.NavigableMap;<a name="line.18"></a>
<span class="sourceLineNo">019</span>import java.util.SortedSet;<a name="line.19"></a>
<span class="sourceLineNo">020</span>import java.util.TreeMap;<a name="line.20"></a>
<span class="sourceLineNo">021</span><a name="line.21"></a>
<span class="sourceLineNo">022</span>import org.jsimpledb.util.ByteReader;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import org.jsimpledb.util.ByteWriter;<a name="line.23"></a>
<span class="sourceLineNo">024</span><a name="line.24"></a>
<span class="sourceLineNo">025</span>/**<a name="line.25"></a>
<span class="sourceLineNo">026</span> * Map field.<a name="line.26"></a>
<span class="sourceLineNo">027</span> *<a name="line.27"></a>
<span class="sourceLineNo">028</span> * @param &lt;K&gt; Map key type<a name="line.28"></a>
<span class="sourceLineNo">029</span> * @param &lt;V&gt; Map value type<a name="line.29"></a>
<span class="sourceLineNo">030</span> */<a name="line.30"></a>
<span class="sourceLineNo">031</span>public class MapField&lt;K, V&gt; extends ComplexField&lt;NavigableMap&lt;K, V&gt;&gt; {<a name="line.31"></a>
<span class="sourceLineNo">032</span><a name="line.32"></a>
<span class="sourceLineNo">033</span>    public static final String KEY_FIELD_NAME = "key";<a name="line.33"></a>
<span class="sourceLineNo">034</span>    public static final String VALUE_FIELD_NAME = "value";<a name="line.34"></a>
<span class="sourceLineNo">035</span><a name="line.35"></a>
<span class="sourceLineNo">036</span>    final SimpleField&lt;K&gt; keyField;<a name="line.36"></a>
<span class="sourceLineNo">037</span>    final SimpleField&lt;V&gt; valueField;<a name="line.37"></a>
<span class="sourceLineNo">038</span><a name="line.38"></a>
<span class="sourceLineNo">039</span>    /**<a name="line.39"></a>
<span class="sourceLineNo">040</span>     * Constructor.<a name="line.40"></a>
<span class="sourceLineNo">041</span>     *<a name="line.41"></a>
<span class="sourceLineNo">042</span>     * @param objType the object type that contains this field<a name="line.42"></a>
<span class="sourceLineNo">043</span>     * @param name the name of the field<a name="line.43"></a>
<span class="sourceLineNo">044</span>     * @param storageId field content storage ID<a name="line.44"></a>
<span class="sourceLineNo">045</span>     * @param schema schema version<a name="line.45"></a>
<span class="sourceLineNo">046</span>     * @param keyField this field's key sub-field<a name="line.46"></a>
<span class="sourceLineNo">047</span>     * @param valueField this field's value sub-field<a name="line.47"></a>
<span class="sourceLineNo">048</span>     * @throws IllegalArgumentException if any parameter is null<a name="line.48"></a>
<span class="sourceLineNo">049</span>     * @throws IllegalArgumentException if {@code storageId} is non-positive<a name="line.49"></a>
<span class="sourceLineNo">050</span>     */<a name="line.50"></a>
<span class="sourceLineNo">051</span>    @SuppressWarnings("serial")<a name="line.51"></a>
<span class="sourceLineNo">052</span>    MapField(String name, int storageId, Schema schema, SimpleField&lt;K&gt; keyField, SimpleField&lt;V&gt; valueField) {<a name="line.52"></a>
<span class="sourceLineNo">053</span>        super(name, storageId, schema, new TypeToken&lt;NavigableMap&lt;K, V&gt;&gt;() { }<a name="line.53"></a>
<span class="sourceLineNo">054</span>          .where(new TypeParameter&lt;K&gt;() { }, keyField.typeToken.wrap())<a name="line.54"></a>
<span class="sourceLineNo">055</span>          .where(new TypeParameter&lt;V&gt;() { }, valueField.typeToken.wrap()));<a name="line.55"></a>
<span class="sourceLineNo">056</span>        this.keyField = keyField;<a name="line.56"></a>
<span class="sourceLineNo">057</span>        this.valueField = valueField;<a name="line.57"></a>
<span class="sourceLineNo">058</span>        assert this.keyField.parent == null;<a name="line.58"></a>
<span class="sourceLineNo">059</span>        assert this.valueField.parent == null;<a name="line.59"></a>
<span class="sourceLineNo">060</span>        this.keyField.parent = this;<a name="line.60"></a>
<span class="sourceLineNo">061</span>        this.valueField.parent = this;<a name="line.61"></a>
<span class="sourceLineNo">062</span>    }<a name="line.62"></a>
<span class="sourceLineNo">063</span><a name="line.63"></a>
<span class="sourceLineNo">064</span>// Public methods<a name="line.64"></a>
<span class="sourceLineNo">065</span><a name="line.65"></a>
<span class="sourceLineNo">066</span>    /**<a name="line.66"></a>
<span class="sourceLineNo">067</span>     * Get the key field.<a name="line.67"></a>
<span class="sourceLineNo">068</span>     *<a name="line.68"></a>
<span class="sourceLineNo">069</span>     * @return map key field<a name="line.69"></a>
<span class="sourceLineNo">070</span>     */<a name="line.70"></a>
<span class="sourceLineNo">071</span>    public SimpleField&lt;K&gt; getKeyField() {<a name="line.71"></a>
<span class="sourceLineNo">072</span>        return this.keyField;<a name="line.72"></a>
<span class="sourceLineNo">073</span>    }<a name="line.73"></a>
<span class="sourceLineNo">074</span><a name="line.74"></a>
<span class="sourceLineNo">075</span>    /**<a name="line.75"></a>
<span class="sourceLineNo">076</span>     * Get the value field.<a name="line.76"></a>
<span class="sourceLineNo">077</span>     *<a name="line.77"></a>
<span class="sourceLineNo">078</span>     * @return map value field<a name="line.78"></a>
<span class="sourceLineNo">079</span>     */<a name="line.79"></a>
<span class="sourceLineNo">080</span>    public SimpleField&lt;V&gt; getValueField() {<a name="line.80"></a>
<span class="sourceLineNo">081</span>        return this.valueField;<a name="line.81"></a>
<span class="sourceLineNo">082</span>    }<a name="line.82"></a>
<span class="sourceLineNo">083</span><a name="line.83"></a>
<span class="sourceLineNo">084</span>    @Override<a name="line.84"></a>
<span class="sourceLineNo">085</span>    public List&lt;SimpleField&lt;?&gt;&gt; getSubFields() {<a name="line.85"></a>
<span class="sourceLineNo">086</span>        final ArrayList&lt;SimpleField&lt;?&gt;&gt; list = new ArrayList&lt;&gt;(2);<a name="line.86"></a>
<span class="sourceLineNo">087</span>        list.add(this.keyField);<a name="line.87"></a>
<span class="sourceLineNo">088</span>        list.add(this.valueField);<a name="line.88"></a>
<span class="sourceLineNo">089</span>        return list;<a name="line.89"></a>
<span class="sourceLineNo">090</span>    }<a name="line.90"></a>
<span class="sourceLineNo">091</span><a name="line.91"></a>
<span class="sourceLineNo">092</span>    @Override<a name="line.92"></a>
<span class="sourceLineNo">093</span>    @SuppressWarnings("unchecked")<a name="line.93"></a>
<span class="sourceLineNo">094</span>    public NavigableMap&lt;K, V&gt; getValue(Transaction tx, ObjId id) {<a name="line.94"></a>
<span class="sourceLineNo">095</span>        if (tx == null)<a name="line.95"></a>
<span class="sourceLineNo">096</span>            throw new IllegalArgumentException("null tx");<a name="line.96"></a>
<span class="sourceLineNo">097</span>        return (NavigableMap&lt;K, V&gt;)tx.readMapField(id, this.storageId, false);<a name="line.97"></a>
<span class="sourceLineNo">098</span>    }<a name="line.98"></a>
<span class="sourceLineNo">099</span><a name="line.99"></a>
<span class="sourceLineNo">100</span>    @Override<a name="line.100"></a>
<span class="sourceLineNo">101</span>    public boolean hasDefaultValue(Transaction tx, ObjId id) {<a name="line.101"></a>
<span class="sourceLineNo">102</span>        return this.getValue(tx, id).isEmpty();<a name="line.102"></a>
<span class="sourceLineNo">103</span>    }<a name="line.103"></a>
<span class="sourceLineNo">104</span><a name="line.104"></a>
<span class="sourceLineNo">105</span>    @Override<a name="line.105"></a>
<span class="sourceLineNo">106</span>    public String toString() {<a name="line.106"></a>
<span class="sourceLineNo">107</span>        return "map field `" + this.name + "' containing key "<a name="line.107"></a>
<span class="sourceLineNo">108</span>          + this.keyField.fieldType + " and value " + this.valueField.fieldType;<a name="line.108"></a>
<span class="sourceLineNo">109</span>    }<a name="line.109"></a>
<span class="sourceLineNo">110</span><a name="line.110"></a>
<span class="sourceLineNo">111</span>    @Override<a name="line.111"></a>
<span class="sourceLineNo">112</span>    public &lt;R&gt; R visit(FieldSwitch&lt;R&gt; target) {<a name="line.112"></a>
<span class="sourceLineNo">113</span>        return target.caseMapField(this);<a name="line.113"></a>
<span class="sourceLineNo">114</span>    }<a name="line.114"></a>
<span class="sourceLineNo">115</span><a name="line.115"></a>
<span class="sourceLineNo">116</span>// Non-public methods<a name="line.116"></a>
<span class="sourceLineNo">117</span><a name="line.117"></a>
<span class="sourceLineNo">118</span>    @Override<a name="line.118"></a>
<span class="sourceLineNo">119</span>    @SuppressWarnings("unchecked")<a name="line.119"></a>
<span class="sourceLineNo">120</span>    &lt;F&gt; Iterable&lt;F&gt; iterateSubField(Transaction tx, ObjId id, SimpleField&lt;F&gt; subField) {<a name="line.120"></a>
<span class="sourceLineNo">121</span>        if (subField == this.keyField)<a name="line.121"></a>
<span class="sourceLineNo">122</span>            return (Iterable&lt;F&gt;)this.getValue(tx, id).keySet();<a name="line.122"></a>
<span class="sourceLineNo">123</span>        if (subField == this.valueField)<a name="line.123"></a>
<span class="sourceLineNo">124</span>            return (Iterable&lt;F&gt;)this.getValue(tx, id).values();<a name="line.124"></a>
<span class="sourceLineNo">125</span>        throw new IllegalArgumentException("unknown sub-field");<a name="line.125"></a>
<span class="sourceLineNo">126</span>    }<a name="line.126"></a>
<span class="sourceLineNo">127</span><a name="line.127"></a>
<span class="sourceLineNo">128</span>    @Override<a name="line.128"></a>
<span class="sourceLineNo">129</span>    NavigableMap&lt;K, V&gt; getValueInternal(Transaction tx, ObjId id) {<a name="line.129"></a>
<span class="sourceLineNo">130</span>        return new JSMap&lt;K, V&gt;(tx, this, id);<a name="line.130"></a>
<span class="sourceLineNo">131</span>    }<a name="line.131"></a>
<span class="sourceLineNo">132</span><a name="line.132"></a>
<span class="sourceLineNo">133</span>    @Override<a name="line.133"></a>
<span class="sourceLineNo">134</span>    NavigableMap&lt;K, V&gt; getValueReadOnlyCopy(Transaction tx, ObjId id) {<a name="line.134"></a>
<span class="sourceLineNo">135</span>        return Maps.unmodifiableNavigableMap(new TreeMap&lt;K, V&gt;(this.getValueInternal(tx, id)));<a name="line.135"></a>
<span class="sourceLineNo">136</span>    }<a name="line.136"></a>
<span class="sourceLineNo">137</span><a name="line.137"></a>
<span class="sourceLineNo">138</span>    @Override<a name="line.138"></a>
<span class="sourceLineNo">139</span>    MapFieldStorageInfo&lt;K, V&gt; toStorageInfo() {<a name="line.139"></a>
<span class="sourceLineNo">140</span>        return new MapFieldStorageInfo&lt;K, V&gt;(this);<a name="line.140"></a>
<span class="sourceLineNo">141</span>    }<a name="line.141"></a>
<span class="sourceLineNo">142</span><a name="line.142"></a>
<span class="sourceLineNo">143</span>    @Override<a name="line.143"></a>
<span class="sourceLineNo">144</span>    void copy(ObjId srcId, ObjId dstId, Transaction srcTx, Transaction dstTx) {<a name="line.144"></a>
<span class="sourceLineNo">145</span>        final FieldType&lt;K&gt; keyFieldType = this.keyField.fieldType;<a name="line.145"></a>
<span class="sourceLineNo">146</span>        final NavigableMap&lt;K, V&gt; src = this.getValue(srcTx, srcId);<a name="line.146"></a>
<span class="sourceLineNo">147</span>        final NavigableMap&lt;K, V&gt; dst = this.getValue(dstTx, dstId);<a name="line.147"></a>
<span class="sourceLineNo">148</span>        final Iterator&lt;Map.Entry&lt;K, V&gt;&gt; si = src.entrySet().iterator();<a name="line.148"></a>
<span class="sourceLineNo">149</span>        final Iterator&lt;Map.Entry&lt;K, V&gt;&gt; di = dst.entrySet().iterator();<a name="line.149"></a>
<span class="sourceLineNo">150</span>        if (!si.hasNext()) {<a name="line.150"></a>
<span class="sourceLineNo">151</span>            dst.clear();<a name="line.151"></a>
<span class="sourceLineNo">152</span>            return;<a name="line.152"></a>
<span class="sourceLineNo">153</span>        }<a name="line.153"></a>
<span class="sourceLineNo">154</span>        if (!di.hasNext()) {<a name="line.154"></a>
<span class="sourceLineNo">155</span>            dst.putAll(src);<a name="line.155"></a>
<span class="sourceLineNo">156</span>            return;<a name="line.156"></a>
<span class="sourceLineNo">157</span>        }<a name="line.157"></a>
<span class="sourceLineNo">158</span>        Map.Entry&lt;K, V&gt; s = si.next();<a name="line.158"></a>
<span class="sourceLineNo">159</span>        Map.Entry&lt;K, V&gt; d = di.next();<a name="line.159"></a>
<span class="sourceLineNo">160</span>        while (true) {<a name="line.160"></a>
<span class="sourceLineNo">161</span>            final int diff = keyFieldType.compare(s.getKey(), d.getKey());<a name="line.161"></a>
<span class="sourceLineNo">162</span>            boolean sadvance = true;<a name="line.162"></a>
<span class="sourceLineNo">163</span>            boolean dadvance = true;<a name="line.163"></a>
<span class="sourceLineNo">164</span>            if (diff &lt; 0) {<a name="line.164"></a>
<span class="sourceLineNo">165</span>                dst.put(s.getKey(), s.getValue());<a name="line.165"></a>
<span class="sourceLineNo">166</span>                dadvance = false;<a name="line.166"></a>
<span class="sourceLineNo">167</span>            } else if (diff &gt; 0) {<a name="line.167"></a>
<span class="sourceLineNo">168</span>                di.remove();<a name="line.168"></a>
<span class="sourceLineNo">169</span>                sadvance = false;<a name="line.169"></a>
<span class="sourceLineNo">170</span>            } else<a name="line.170"></a>
<span class="sourceLineNo">171</span>                d.setValue(s.getValue());<a name="line.171"></a>
<span class="sourceLineNo">172</span>            if (sadvance) {<a name="line.172"></a>
<span class="sourceLineNo">173</span>                if (!si.hasNext()) {<a name="line.173"></a>
<span class="sourceLineNo">174</span>                    dst.tailMap(s.getKey(), false).clear();<a name="line.174"></a>
<span class="sourceLineNo">175</span>                    return;<a name="line.175"></a>
<span class="sourceLineNo">176</span>                }<a name="line.176"></a>
<span class="sourceLineNo">177</span>                s = si.next();<a name="line.177"></a>
<span class="sourceLineNo">178</span>            }<a name="line.178"></a>
<span class="sourceLineNo">179</span>            if (dadvance) {<a name="line.179"></a>
<span class="sourceLineNo">180</span>                if (!di.hasNext()) {<a name="line.180"></a>
<span class="sourceLineNo">181</span>                    dst.putAll(src.tailMap(s.getKey(), true));<a name="line.181"></a>
<span class="sourceLineNo">182</span>                    return;<a name="line.182"></a>
<span class="sourceLineNo">183</span>                }<a name="line.183"></a>
<span class="sourceLineNo">184</span>                d = di.next();<a name="line.184"></a>
<span class="sourceLineNo">185</span>            }<a name="line.185"></a>
<span class="sourceLineNo">186</span>        }<a name="line.186"></a>
<span class="sourceLineNo">187</span>    }<a name="line.187"></a>
<span class="sourceLineNo">188</span><a name="line.188"></a>
<span class="sourceLineNo">189</span>    @Override<a name="line.189"></a>
<span class="sourceLineNo">190</span>    void buildIndexEntry(ObjId id, SimpleField&lt;?&gt; subField, ByteReader reader, byte[] value, ByteWriter writer) {<a name="line.190"></a>
<span class="sourceLineNo">191</span>        if (subField == this.keyField) {<a name="line.191"></a>
<span class="sourceLineNo">192</span>            writer.write(reader);<a name="line.192"></a>
<span class="sourceLineNo">193</span>            id.writeTo(writer);<a name="line.193"></a>
<span class="sourceLineNo">194</span>        } else if (subField == this.valueField) {<a name="line.194"></a>
<span class="sourceLineNo">195</span>            writer.write(value);<a name="line.195"></a>
<span class="sourceLineNo">196</span>            id.writeTo(writer);<a name="line.196"></a>
<span class="sourceLineNo">197</span>            writer.write(reader);<a name="line.197"></a>
<span class="sourceLineNo">198</span>        } else<a name="line.198"></a>
<span class="sourceLineNo">199</span>            throw new RuntimeException("internal error");<a name="line.199"></a>
<span class="sourceLineNo">200</span>    }<a name="line.200"></a>
<span class="sourceLineNo">201</span><a name="line.201"></a>
<span class="sourceLineNo">202</span>    @Override<a name="line.202"></a>
<span class="sourceLineNo">203</span>    void unreferenceRemovedObjectTypes(Transaction tx, ObjId id, ReferenceField subField, SortedSet&lt;Integer&gt; removedStorageIds) {<a name="line.203"></a>
<span class="sourceLineNo">204</span>        assert subField == this.keyField || subField == this.valueField;<a name="line.204"></a>
<span class="sourceLineNo">205</span>        for (Iterator&lt;Map.Entry&lt;K, V&gt;&gt; i = this.getValueInternal(tx, id).entrySet().iterator(); i.hasNext(); ) {<a name="line.205"></a>
<span class="sourceLineNo">206</span>            final Map.Entry&lt;K, V&gt; entry = i.next();<a name="line.206"></a>
<span class="sourceLineNo">207</span>            final ObjId ref = subField == this.keyField ? (ObjId)entry.getKey() : (ObjId)entry.getValue();<a name="line.207"></a>
<span class="sourceLineNo">208</span>            if (ref != null &amp;&amp; removedStorageIds.contains(ref.getStorageId()))<a name="line.208"></a>
<span class="sourceLineNo">209</span>                i.remove();<a name="line.209"></a>
<span class="sourceLineNo">210</span>        }<a name="line.210"></a>
<span class="sourceLineNo">211</span>    }<a name="line.211"></a>
<span class="sourceLineNo">212</span>}<a name="line.212"></a>
<span class="sourceLineNo">213</span><a name="line.213"></a>




























































</pre>
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